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Engine code: P0171 system too lean bank 1


Snotty13

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Hey new member had abit of a look and couldn’t see if anything had been put up about this but I’m stuck with a engine code that I can’t figure out 

2007 Toyota hiace 2trfe Petrol/lpg: code p0171 system too lean bank 1

car will drive fine but as soon as I come to a stop and have the car idle the engine light comes on 

things I have fixed: maf sensor, both oxygen sensors, vacuum switch assy,

had the car vacuum leak tested been to 2 mechanics and still haven’t been able to nail the problem code comes up on lpg and petrol 

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